Use a different entry script to generate the startup snapshot

script/lib/generate-startup-snapshot.js

@@ -13,7 +13,7 @@ module.exports = function () {
   ])
   const snapshotScriptContent = electronLink({
     baseDirPath: CONFIG.intermediateAppPath,
-    mainPath: path.join(CONFIG.intermediateAppPath, 'src', 'initialize-application-window.js'),
+    mainPath: path.join(CONFIG.intermediateAppPath, 'src', 'initialize-snapshot.js'),
     shouldExcludeModule: (modulePath) => {
       const relativePath = path.relative(CONFIG.intermediateAppPath, modulePath)
       return (

src/initialize-snapshot.js

@@ -0,0 +1,5 @@
+require('./update-process-env')
+require('./window')
+require('./atom-environment')
+require('./application-delegate')
+require('./clipboard')